*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
section{
  position: relative;
  width: 100%;
  height: 100vh;
}
section video{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
section .navigation{
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
}
section .navigation li{
  list-style: none;
  cursor: pointer;
  margin: 0 10px;
  border-radius: 4px;
  background: #fff;
  padding: 3px 3px 0;
  opacity: 0.7;
  transition: 0.5s;
}
section .navigation li:hover{
  opacity: 1;
}
section .navigation li img{
  width: 120px;
  transition: 0.5s;
}
section .navigation li img:hover{
  width: 200px;
}
